Drilling-machine.



No. 884,529. PATENTED APR. 14, 1908. e. A. SBIB & I. A. WESTON.

DRILLING MACHINE.

APPLICATION FILED NOV. 17, 1905.

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QQTTURNEK No. 884,529. PATENTED APR. 14, 1908. G. A. SEIB & I. A.WESTON. DRILLING MACHINE.

APPLICATION FILED NOV.17, 1906.

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20 z/M/ c: I/z WEQI 1M2 4 46 J 57 2/ f3 [NI/E T055 8. 5. mm (L -wigOQTTUHNEY drill into and out of the without necessitatin UNITED STATESGEORGE A. SEIB AND IRVING A. w

ESTON, OF SYRACUSE, NEW YORK.

DRILLING-MACHINE.

No. 884,529. Specification of Application filed November 17,

Patented April 14, 1908. 1905. Serial No. 287,883.

Letters Patent.

To all whom it may concern:

Be it known that'we, GEORGE A. SEIB and IRVING A. WESTON, of Syracuse,in the county of Onondaga, in the State of New York, have inventednewand useful Improvements in Drilling-Machines, of which the following,taken in connection with the accompanying drawings, is a full, clear,and exact description.

This invention relates to improvements in drilling machines in which anyrotary drivin spindle or shaft carrying a suitable drill holding chuckis movable axially to force the work or toward and away from anunderlying work supporting bed or plate. In drilling machines of thischaracter it is customary to drive the shaft or spindle positively andto feed it axially either by hand or automatically.

\Vhen fed by hand the work is particu larly laborious especially indrilling tempered or hard metal, by reason of the necessity for thecontinuous hand pressure u on the feeding lever, the position of whichis continuously changing as the drill progresses through the work. Onthe other hand when the axial feed is purely automatic and ositive thereis always more or less liability ofbreaking orunduly heating the drillsowing partially to the different de rees of hardness of the metal throuh whic the drill may be cific construction of the semi-automatic feedwill be brought out in the following descrip .tion.

In the drawings,-Fi urc 1 is a side elevation of a portion of a dril ingmachine showing our improved feeding device as applied thereto. Figs. 2and 3 are horizontal sectional views taken respectively on line 22 oftion of the upright supporting standar or frame 1 of an ordinarydrilling machine having laterally extending arms -2- and 3 havingsuitable bearings 4- and 5- for supporting a vertical rotary shaft orspindle 6, upon which is feathered a ulley 7, the latter being connectedby a belt +8 to any available source of power, not necessary to hereinillustrate or T e lower end of the rotary spindle or shaft 6 isjournaled in a non-rotatable sleeve 9 which is movable axially orvertically with the shaft 6- in the bearing passing, or to t e differentsizes of drills which may be alternately employed.

The essential object of our resent inven tion is to gage the axial feed0 the drill into the Work according to the quality of the material whichis being operated upon. In other words, We have sought to produce whatmaybe termed a semi-automatic feed, that is, one in which the feed ispartially manual and partially automatic and involving the use of thesli -feed or friction clutch controlled by a handle which 0 erates byits own gravity to throw the slip feed into action.

Our purpose is to manufacture this semiautomatic feeding deviceseparately so that it may be readily applied to any of the ordinarydrilling machmes now on the market any material alterabe apparent fromthe following description that it may be constructed as a unitary partof the machine and used in other analogous devices, such as, wood boringmachines, and in fact in any axially movable rotary cutting element.

Other objects and uses relating to the spetions, although it wil -5- andis provided on its rear face with a toothed-rack 10 meshing with therotary pinion -11 which is formed upon or secured to a horizontal rotaryshat 12, Fig. 2, the latter shaft being journaled in a suitable bearing-13 in the arm 3 just at the rear of the vertical shaft -6-. This lowerend of the shaft 6 within the sleeve 9 is enlarged forming an annularshoulder -14- and the u per end of the sleeve -9- is interpose betweenthis shoulder 14 and a suitable collar 15 which is keyed to the shaft 6for the purpose of locking the shaft 6 and sleeve 9 against independentaxial movement and at the same time permitting the shaft 6 to rotatewithin the sleeve 9, the enlarged portion of said shaft 6 being providedwith a tapering socket 16- for receiving any suitable drill chuck, notshown, as these drill chucks are well known and it is believed'to beunnecessary to enter into any detailed description of the same.

Secured to the arms 2 and 3- in vertical alinementare bearings l7-- andcability of our invention we have shown a or-' describe.

18 in which is 'oumaled an auxiliary rotary shaft or s in 1e 19- havingrigid thereon nearits ower end a worm -20- meshing with a worm gear -21which is loosely mounted upon the horizontal shaft 12- and u on theupper end of the spindle 19- is feat ered a spur-gear 22- meshing with asimilar spur gear .-23- which is feathered upon the vertical shaft -'6whereby rotary motion is transmitted from the shaft 6 to the auxiliaryshaft or spindle -19- and worm 20.

When the machine is in operation the drill shafts 6- and 19 and worm-20- rotate continuously and therefore transmit similar rotary motion tothe loose worm gear --21-. This worm gear 21-: is provided with afriction face 24 adapted to be engaged b a similar friction face 25- ofa sliding c utch element 26 which is feathered upon the shaft --12 totransmit rotary motion to said shaft when the clutch member -26- ismoved axiall in a manner hereinafter described, into 'ctional'engagementwith the continuously rotating The outer end ofthe clutch element --26earns 27- adapted to be engaged by similar inclined faces or cams -28 ofa manuall operated rocking element 29 which is oose on the shaft -12-and is provided with a suitable hand iece 30 for rocking the same uponthe s aft 12.

e A collar -31- is keyed to the shaft 12- at the outer end of therocking member 29 and is provided with a laterally projecting arm 32over-hanging the periphery of the rocking member -2 9- for receiving andsupporting a handle 33 in substantially the same transverse plane as thehandle -30, so that both handles may be grasped in the handsimultaneously, if necessary. This collar 31- is interposed between theadjacent end of the'rocking member -29 and a suitable end thrust bearing-34- which encircles the shaft 1 2 and is held in. operative dpositionby lock-nuts 35- engaging the a jacent threaded end of the said shaft-12-. The op osite end of this horizontal shaft upon who the pinion 11.is secured is provided with an enlargement or head 36, between which andthe adjacent end of the bearing 13- is interposed an end-thrust bearing37, a similar end-thrust bearing 38' being interposed between theopposite end of the -bearmg --13- and adjacent face of the worm gear 21-to prevent endwise movement of the said worm gear. It is now obviousthat the-gear -2l, clutch element 26., rocking member 29 and collar-31-: are arranged in the order named end to end between the end-thrustbearings 34- and 38*, the worm gear 2I- being further held against axialmovement by a screw 40- which has its inner end seatedin an annulargroove -'-41 in the shaft 1 2. i

The sliding clutch member 26 has only a slight axial movement and isnormally held out of engagement with the worm gear 21 by means of a sring 42- acting upon a key 43 whic engages the adjacent face of theclutch element 26 so that the cam faces -27- and 28 are normally out o?engagement with each other. It is now cfeag that the operator, bydrawing downwardly upon the handle .-33-, may rock the shaft 12 andpinion 1 1- to feed the sleeve 9- and drill shaft -6 to positively forcethe drill into the work without effecting the operation of the frictionclutch 26 On the other hand when a slip or semi-automatic feed isdesired the handle 30 is allowed to descend by gravity or by handressure and rocks the member 29, in t e direction indicated by arrow a:Fig. 1, thereby engaging the cam faces --28-'- with the cams 27- andforcing the clutch member 26- into frictional engagement with thecontinuously rotating worm gear 24- by which rotarymotion is imparted tothe shaft 12 and pinion -11.- to move the drill shaft .6 downwardly.

A compression spring 44 is interposed between the arm 32 of the lever33-' and a lug 45- on the face of the loose rocking member 29- and tendsto restore the rocking element -+2 9- to its normal position to allowthe clutch member 26 to be thrown out of frictional engagement with the'worm gear 21'- b the spring 42, particularly when the ever 33 is oerated to elevate the drill spindle.

VFhen the drill spindle is fed positively by the hand ,lever -33- theclutch member 26 rotates with it and therefore the lever -30 may follow.the 'movement of the lever -33' without throwing the clutch member 26-into frictional engagement with the worm gear 24, but when it is desiredto feed the drill spindle downwardly automaticall the lever 30- isrocked by hand towar the lever 33 sufficient to cause the cam faces 27and 28- to engage and throw the clutch member -26- into frictionalengagement with the worm gear 24, it being apparent that only a verylight pressure upon the lever 30 is rerfiuired to effect this frictionalengagement an that the labor is, therefore, reduced to a minimum and atthe same time, if the drill should encounter any obstructions, such asblow-holes, or was feeding faster than it could cut,-the friction faces24 and 25- would simpl sli one upon the other until the drill ha suciently recovered itself to progress into the work. This friction feed,

. ping the friction feed,

. the shaft 12'- is rotated is therefore, of great importance owing)tothe fact that it is self-acting and requires ut little pressure as theweight of the handle 30.- to feed the drill downwardly into the work'andat the same time the hability of breaking or unduly dulling the drill isreduced to a minimum. In restoring the drill spindle 6- to its normalup-right position it is simply necessary for the operator to lift thelevcr 33, which not only elevates the spindle but also throws thefriction clutch 26 out of action. I

In Fig. 6 I have shown a modified means of controlling the feedconsisting of clutch members 26 and 29- corresponding to the parts 26and -29 except that the member '29- is unprovided with ya hand leverybutis provided with a pair of axially projecting studs -50- and 51 to wlnchare pivoted links 52 and 53-."

having their u or ends connected respectively to hand evers 54 and 55.These levers -54- and -55 are 'fulcrumed upon a head 56 which in turn issecured to a hand lever 57' havin its.

lower end securedto a collar 31 w lich is ke ed or otherwise secured toa shaft -12- simifar to the shaft 12, otherwise the parts are the sameas those seen in Figs. 1 to 5 inclusive.

In the construction shown in Figs. 6 and 7 positivel by the lever 57 tofeed the drill spind e -6- downwardly and upwardly, but when thefriction feed is desired the lever -54- is moved in the directionindicated by the arrow 1 Fig. 6, which rocks the cam member -29, therebyengaging its cam faces .28' with the corresponding cam faces 27 of theclutch member 26 and forcing said clutch member into frictionalengagement with the worm gear as 21, so that rotary motion is impartedfrom said worm gear to the shaft 12 and pinionv 11 for feeding the drillshaft 6- downwardly. The clutch member 2 6 is released from frictionalengagement with the worm gear 21 by rocking the lever 55 toward thehandle 56, asshown in Fig. 6, by which movement the cam -29- is rockedto its normal position, thus sto whereupon, the drill spindle work bymeans of the handle -57.

What we claim is,

1. In a drilling machine, a rotary axially movable drill spindle, ashaft and pinion for moving the said spindle axially, a slip feed forrotating the shaft, a hand-piece for controlling the slip feedmechanism, a second hand-piece and connections for rotatingthe shaftindependently of the slip feed mechanism, and connections between saidhandpieces whereby the return of the second hand- -member and the drillspindle the first may be elevated out of the piece automatically throwsthe slip feed mechanism out of action.

2. In combination with a rotary axially movable drill spindle and meansfor rotating said -spindle, a rack and pinion formoving the spindleaxially, a rotary'shaft to whi the pinion is secured, a clutch com osedof two members, one being loose on thes aft and the other keyed to itand slidable endwise thereon into and out of frictional engagement withthe loose clutch element, means to rotate the loose element, a rockingmember A loose on the shaft and provided with means for forcing thekeyed clutch element into engagement with the loose clutch element forrotatin' the shaft under a slip feed, a second rocfiing member ke ed tothe shaft and provided with a handle whereby the shaft may be rockedindependently of the slip feed, and connections between said rockingmembers whereby the movement of one rocking member in one directionoperates the other rocking member in the same direction.

3. In combination with a rotary axially .{novable drills indle and meansto rotate the same, a rac and pinion for moving the spindle axially, ashaft secured to the inion, ear and rocking member .bot loose aft, aworm to rotate thegear, a connection between the rocking gear wherebyrotary motion is impartedfrom said gear to the shaft for moving the sindle axially, separate means operated by and for rotating the shaftindependently of the first named rocking means, and connections betweenthe rockin members whereby when the last name rocking member 1s on the sslip feed is operated to throw the slip feed connection between the gearand shaft out of action.

4. The combination with a drill spindle, a rack and pinion for movingsaid spindle axially, a driving shaft for the inion, a worm gear looseon the shaft, a driving worm for the worm gear, a clutch memberfeathered on the shaft and movable. into frictional engagement with thegear to transmit rotary motion to the shaft, hand operated means formoving said clutch member axially and" additional hand operated meansfor rotating the shaft independently of the said friction clutch, andmeans brought into action by the return of the last named meansforthrowing the clutch out of action.

In witness whereof we have hereunto set our hands on'this 9th day ofNovember, 1905.

GEORGE SEIB. IRVING A. WESTON.

Witnesses:

H. E. CHASE, J. M. HAMMEKEN.

operated to elevate the named rocking member

